DVX
Instruction
Manual
5
When “Get Write Mode” is turned on in the Options Property Sheet, the write mode of the disc will be displayed in the
Disc Info dialog. This feature can be turned off by clearing the checkbox in the Options dialog.
Test Results
The main window shows a summary of all error rates, over-range alarms (Pass / Fail status), and disc Grade.
Error Rates
Error rate data is displayed in two ways: The average and peak values (over the whole disc) are displayed, as well as
totals for E22, and total E32 errors on CDs and for all DVD error types. Each error type is also shown in a graph in the
main window.
One-Second and Ten-Second Averaging (CDs Only)
When the player is testing, it will send all error parameters to DVX once every second of program time. All CD data
displayed in DVX are one-second averages. Many CD analyzers use one second samples, but the Philips Red Book
specification calls for averaging error rates over 10 seconds, so you must be careful in comparing data from different
systems. The one-second data will have higher peaks and lower valleys. The 10-second data is smoother because it is
averaged over more samples. The average values will be identical for one and ten second data. The DVX main
window displays both 1-second and 10-second peak values.
Sum1 and Sum8 Reporting (DVDs Only)
By convention, some DVD errors are reported per 1 ECC block (
), and others are reported
for 8 ECC blocks. PI bytes and PO bytes are always reported per 1 ECC block. PIE and POE errors are counted per 8
ECC blocks. PIF and POF errors are counted per 1 ECC block.
Pass / Fail Indication
If any of these error values goes over a user selectable limit, the indicator will turn red. This provides a simple Pass /
Fail indication of test results (See
Grade
A letter grade A – D, or F is assigned according to the test results. This provides a simple quantitative result without
having to deal with the detailed results. The criteria for the grading systems are explained in the section
Subcode Skew (CD Data Discs Only)
This shows the results of the Subcode Skew test. The Q-channel subcode on a disc contains time code, called Atime,
which is used for rapid locating of specific places. This time code should be identical to the sector address contained in
the sector header of a data disc. Any discrepancy between these two values is called Subcode Skew. This type of error
can be caused by the recording system. Skew up to ± 7 sectors is allowed, but any skew will adversely affect search
times. Positive skew means that Atime is higher than the header address. Negative skew means the Atime is less than
the header address. This test applies only to data discs, as audio discs have no sector headers. DVD discs have no
subcode, so this does not apply.
Postgap (CD Data Discs Only)
Shows the results of the Postgap test. The last track on a disc must be followed by a Postgap. The Postgap contains all
zeros (or digital silence). A minimum of 150 sectors is required.
Verify
Shows the results of the Verify Disc or Verify File test. This is the total number of bytes that did not compare, or PASS
or FAIL if the Validate Clover Signature test was performed.
Содержание DVX-4
Страница 1: ...D DV VX X 4 4 DVD CD ANALYZER OPERATING MANUAL Version 3 1 TM...
Страница 2: ...COPYRIGHT 2005 2012 CLOVER SYSTEMS ALL RIGHTS RESERVED...
Страница 43: ...Fig 23 CD HF Eye Pattern DVX Instruction Manual 35...
Страница 57: ...Fig 28 CD Error Test with QuickScan Fig 29 CD Error Test without QuickScan DVX Instruction Manual 49...
Страница 58: ...Fig 30 DVD Error Test without QuickScan Fig 31 DVD Error Test with QuickScan 50 DVX Instruction Manual...
